RADIOCHIMICA ACTA
·
2023
·Vol. 111
·期 12
·909-918
·
IF 1.8
Lingting Xia,Han Wu,Jing Gao,Tianzhen Ye,Long Qiu,Feize Li,Tu Lan,Jijun Yang,Jiali Liao,Ning Liu,Yuanyou Yang
In this work, a gallium–nickel alloy target with a weight percentage ratio of 7:3 was successfully prepared on Cu substrate in a chloride system at room temperature. A novel organic-solvent-free separation procedure based on two columns for extracting 68 Ge from irradiated Ga–Ni alloy target with high radionuclidic purity (99.99 %) was developed. By this separation procedure, the recovery of 68 Ge is 95 ± 5 % and the yield of 68 Ge via the nuclear reaction nat Ga(p, x n) 68 Ge was measured to be 0.27 ± 0.02 MBq/μA h.
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JOURNAL OF NANOSCIENCE AND NANOTECHNOLOGY
·
2016
·Vol. 16
·期 12
·12635-12639
·
IF 1.338
Du Jingjing,Xie Shaowen,Li Na,Xu Jianxiong,Xu Lijian
Hierarchical nanoporous Al–SiO2 particles were prepared in this study by dissolving template method. The hierarchical nanoporous Al–SiO2 particles with hollow structure were analyzed by transmission electron microscope (TEM), energy dispersive spectrometer
(EDS), scanning electron microscope (SEM), nitrogen adsorption stripping curves and Barrett-Joyner-Halenda (BJH) pore size distribution curves. Hierarchical nanoporous Al–SiO2/Ni–Mo composite electrodes were prepared by composite deposition of hierarchical nanoporous
Al–SiO2 particles onto electroplating bath of Ni–Mo. Results showed that the specific surface area for the hierarchical nanoporous Al–SiO2 sample was 396 m2/g, with pore volume being 1.37 cm3/g and mesoporous pore size being 3.3
nm. The hydrogen evolution electrocatalytic activities for the composite electrodes reached the optimal value when the concentration of the hierarchical nanoporous Al–SiO2 in the electroplating bath was 2 g/L, indicating that their “foam” structure did not only
enhance the electrode surface area but also effectively improved the electrocatalytic properties of aluminum and showed that the electrocatalytic hydrogen evolution by the hierarchical nanoporous Al–SiO2/Ni–Mo composite electrodes had more advantages than that of the
Ni–Mo electrodes alone.
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CATALYSIS LETTERS
·
2020
·Vol. 151
·期 6
·1707-1719
·
IF 2.482
Wang Hong,Li Yaoyao,Liu Zhongying,Liu Jiawang,Yang Renchun
To achieve the well-dispersed Ni–NiS dual-cocatalysts anchored CdS, the samples have been successfully constructed by a cheap and convenient method of hydroxy acid assisted hydrothermal method. Based on the coordination and reduction effects of hydroxy acids, Ni 2+ can be facilely transformed into the high dispersed dual-function sites of Ni 0 electrons trap and NiS holes reservoir. The highly dispersed Ni–NiS dual-cocatalysts not only provide more dual-function active sites but also present distinctly enhanced visible light absorption, effectively separated electron hole pairs and quickly migrated charge carriers. The optimized Ni–NiS/CdS–CA presented an excellent photocatalytic H 2 generation rate of 57.88 mmol·h −1 ·g −1 , which is about 15.35 times higher than that of NiS/CdS. Moreover, the stability can be distinctly increased by modulating the surface cover of Ni–NiS with a suitable Ni/(Ni + Cd) atomic ratio. This work would provide a unique strategy to design the high effective photocatalysts with high dispersed bi-function dual cocatalysts. Graphic Abstract The well-dispersed Ni-NiS dual-cocatalysts anchored CdS in situ have been successfully constructed via the coordination and reduction effects of hydroxy acid assisted hydrothermal method. Ni-NiS/CdS-CA not only presents dual-function active sites but also exhibits distinctly enhanced visible light absorption, effectively separated electron hole pairs and quickly migrated charge carriers, resulting in a remarkable enhancement in photocatalytic H2 evolution activity.
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ANALYST
·
2020
·Vol. 145
·期 19
·6349-6356
·
IF 3.978
Ye Hu,Chaochao Yue,Jing Wang,Yuhua Zhang,Wenhui Fang,Jiaqi Dang,Ying Wu,Hong Zhao,Zengxi Li
Fe–Ni-MOFs with different amounts of Fe are synthesized through a two-step template etching method. Kinetic analysis indicates that Fe–Ni-MOF exhibits prominent intrinsic peroxidase-like activity, which could catalytically oxidize 3,3′,5,5′-tetramethylbenzidine (TMB) to produce oxidized TMB (oxTMB) with a blue color. As a peroxidase-mimicking MOF, Fe–Ni-MOF with its efficient stable catalysis properties is demonstrated to allow a sensitive colorimetric assay for Sn2+ ions. The mechanism is explored, whereby Sn2+ ions could reduce the peroxidase-like activity of Fe–Ni-MOF based on a redox interaction, making the oxTMB color lighter and decreasing the absorbance intensity at 652 nm. The linear determination of the Sn2+ ion concentration using a UV-vis spectrometer ranges from 0.01 mM to 1.0 mM and from 1.0 mM to 4.0 mM. The presented Fe–Ni-MOF-based assay of Sn2+ ions was successfully applied to real water samples.
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PubMed
高影响因子
CHINESE JOURNAL OF CHEMICAL ENGINEERING
·
2021
·
IF 3.171
Zhen He,Yu Zhou,Yuxin Wang,Pingyi Guo,Wensen Jiang,Caizhen Yao,Xin Shu
Several Ni-W-P-TiO 2 nanocomposite coatings were developed by the sol-enhanced electroplating method. The phase and elemental compositions of coatings were determined, and the surface and cross-section morphology were characterized. The mechanical and corrosion performance were systematically tested. The results revealed the addition of 5 ml·L −1 TiO 2 sol caused a compact coating surface, while higher concentrations of TiO 2 reduced the coating thickness and led to the inferior surface microstructure. The comparison in physiochemical properties of prepared coatings confirmed the superior performance of the Ni-W-P-TiO 2 nanocomposite coating at 5 ml·L −1 TiO 2 sol addition. Under this condition, the best mechanical properties were achieved when abrasive wear was the dominating wear-resistance mechanism, and the best corrosion resistance was obtained due to its smooth and compact surface microstructure.
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COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2020
·
IF 3.99
Sheng Yan,Jun Wu,Yang Dai,Zhijie Pan,Weiqin Sheng,Junming Xu,Kaixin Song
In order to avoid more release of polysulfides into electrolyte, a biomass porous carbon (PC) derived from nodus nelumbinis rhizomatis (NNR) and a network of nickel nitrate hydroxide (Ni 3 (NO 3 ) 2 (OH) 4 , NNH) were firstly utilized as a composite cathode for lithium-sulfur (Li-S) batteries. The NNH/PC/S composite prepared by a mesh-like NNH layer coating in situ on the surface of porous carbon/sulfur composite exhibits an excellent electrochemical performance. The discharge specific capacity is up to 1203.5 mA h g −1 for the initial cycle at 0. 5 C and maintains 521.3 mA h g −1 after 700 cycles. As the current rate is as high as 5 C, the battery with NNH/PC/S cathode still guarantees a sufficient output in specific capacity of 583.9 mA h g −1 . Besides the better conductivity and the accommodation for sulfur from the NNR-derived porous carbon, the coating of the mesh-like NNH layer also plays a critical role in improving the cycling properties by providing a strong adsorption by Ni-S bond and more active sites for redox reactions, and thus suppressing the dissolution of polysulfides .
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高影响因子
APPLIED SURFACE SCIENCE
·
2020
·
IF 6.182
Hongye Zhao,Xiangyang Xu,Yunfei Yao,Yina Li
Si/graphene composite has been considered as a promising structure to limit the volume expansion and improve poor conductivity of silicon anode. Herein, a novel method to prepare Si/reduced graphene oxide (Si/rGO) composite anode was proposed. With this approach, nickel shell was pre-coated on Si particles via electroless deposition before used as a template to in-situ reduce GO. During the reduction process, the nickel template can as well promote the self-assembly of graphene sheets on the surface of Si nanoparticles. Following these facile and convenient processes, a Si/rGO hybrid-structure can be directly fabricated. Compared with pure Si anode, this Si/rGO composite displays a greatly improved electrochemical performance in both cycling stability and rate capability. It delivers a reversible capacity as high as 975 mA h g −1 and 717 mA h g −1 after 300 cycles under the current densities of 1 A g −1 and 3 A g −1 , respectively. Meanwhile, its capacity can still maintain at 602 mA h g −1 even at a rather higher current of 5 A g −1 .
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高影响因子
FUEL
·
2025
·
IF 7.5
Yutong Zhu,Guohua Miao,Yucheng Hu,Ning Yan,Tingting You,Haq Nawaz,Zhen Wu,Feng Xu
Ni-based catalysts show promise in valorization of bio-based aldehydes. Designing an efficient and stable Ni-based catalysts for bio-conversion still remains a significant challenge. In this work, a sustainable, simple, and solvent-free method was developed to synthesize Ni x Zn@CNT catalyst with unique active phase Ni 3 ZnC 0.7 encapsulated in carbon nanotubes (CNT). The amount of active phase was regulated by varying Ni/Zn doping content. The as-obtained Ni 4 Zn@CNT (Ni/Zn ratio is 4:1) demonstrated excellent catalytic activity for furfural hydrogenation, yielding 99% conversion and 86.75% selectivity to furfuryl alcohol (FAOL). Density functional theory (DFT) calculations, XRD, and Py-FTIR analyses demonstrated that the activation of FAOL and H 2 was synergistically enhanced by the formed Ni 3 ZnC 0.7 phase and Ni 0 . Benefiting from the encapsulation of the active phase uniformly in CNT, Ni 4 /Zn@CNT catalyst displayed outstanding reusability with more than 98% of the furfural conversion even after reuse for six times, thereby outperforming most reported Ni-based catalysts. The method developed in this study provides a sustainable approach for preparing highly durable and efficient Ni-based catalysts for hydrogenation reaction.
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高影响因子
FUEL
·
2025
·
IF 7.5
Xin Zhang,Xiangyun Sun,Li Li,Xinli Zhang,Ao-Bing Wang,Huijuan Xu,Lijun Gao,Yaohui Gao,Hui Liu
Developing low-cost, highly efficient and stable non-noble metal-based electrocatalysts for the hydrogen evolution reaction (HER) is crucial for promoting large-scale alkaline water electrolysis. Here, we report a novel self-supporting Ni(OH) x /Mo-Ni 3 S 2 nanosheet heterostructure grown on nickel foam, demonstrating outstanding catalytic performance for alkaline HER. This heterostructure electrocatalyst exhibits an exceptionally low overpotential of just 33 mV at a current density of 10 mA cm −2 in 1 M KOH solution, surpassing commercial Pt/C catalyst. Moreover, it can operate continuously for 300 h at a high current density of around 130 mA cm −2 . Both experimental and theoretical calculations show that strong electronic coupling at the heterojunction interface optimizes the adsorption energy of molecular water and hydrogen on active sites, thereby enhancing the intrinsic activity. This work offers novel insights for designing high-performance alkaline HER electrocatalysts through coupling doping and heterostructure engineering.
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高影响因子
BIOMASS & BIOENERGY
·
2025
·
IF 5.8
Shiting Chen,Sisi Jia,Nan Xi,Qinglian Wang,Yixiong Lin,Chen Yang,Wang Yin,Ting Qiu
Noble metal catalysts, particularly Ru-based, demonstrate exceptional activity during catalytic hydrotreatment of fast pyrolysis liquids (PLs) from lignocellulosic biomass. However, their high cost poses a major barrier to practical applications. Herein, a series of cost-effective bimetallic Ru-Ni catalysts with varying Ru/Ni ratios (5 wt% metal loading, Ru x Ni y /NC) supported on hierarchical nitrogen-doped carbon materials (NC) were facilely prepared by the wet impregnation method. The performance was evaluated for catalytic hydrotreatment of PLs. The results revealed that the introduction of Ni to Ru significantly enhances catalytic performance. Among the tested catalysts, Ru 4 Ni 1 /NC exhibited optimal activity, achieving the product oils with the highest H/C ratio and lowest thermogravimetric (TG) residue. Under mild condition (200 °C, 6 MPa H 2 , 4 h), the catalyst yielded the product oil with an H/C ratio of 1.49 and a TG residue of 10.7 wt%. When subjected to deep hydrotreatment condition (340 °C, 6 MPa H 2 , 4 h), the catalyst generated the product oil with an H/C ratio of 1.32 and a TG residue of 2.9 wt%. To gain insights into the catalytic mechanism, the adsorption behavior of model components in PLs onto the catalyst was investigated through FT-IR. The results revealed that the incorporation of low electronegativity Ni to Ru, induces the electron transfer from Ni to Ru, resulting in electron enrichment at Ru sites and electron deficient at Ni sites, which promotes the adsorption of substrates onto the catalyst, thereby boosting hydrogenation of PLs. These findings highlight the significant potential of bimetallic Ru-Ni/NC for catalytic hydrotreatment of PLs into intermediates that can be co-processed with vacuum gas oil in FCC refinery for biofuel production.
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高影响因子
FUEL
·
2025
·
IF 7.5
Jie Gao,Hangjia Zhang,Jingyu Ran,Chuan Ma,Xin Huang,Yunlin Shao,Huayu Qiu,Zhiliang Ou,Lei Tang
Dry reforming of methane (DRM) is an efficient way to convert the two main greenhouse gases (CH 4 and CO 2 ) into syngas. This study reported an efficient CaCr 2 O 4 -supported Ni-Co bimetallic catalyst for its DRM activity and anti-coking performance through experiments, characterization, and DFT calculations, with an emphasis on elucidating the role of Ni-Co bimetals in CaCr 2 O 4 catalysts. The results demonstrated that the optimal 13Ni2Co/CaCr 2 O 4 catalyst achieved 94.8 % CH 4 and 96.8 % CO 2 conversions, under conditions of 800 °C and 27,000 mL·h −1 ·g −1 . Characterization results indicated that the alloying effect induced by introducing 2 wt% Co promoted the uniform dispersion of active metals, improved the reducibility and surface basicity of the catalyst, which collectively contributed to its superior catalytic performance. The catalyst also exhibited high thermal stability and excellent coke resistance at 800 °C, with a surface carbon deposition amount of only 0.93 % after 10 h continuous operation. This was attributed to the weak adsorption of surface carbon by Co, thereby reducing the carbon deposition degree. Moreover, the abundant strong basic sites on the surface significantly enhance CO 2 adsorption, while the surface-active adsorbed oxygen further facilitates the elimination of carbon deposits. This research provides valuable insights for the design and development of alloy catalysts in catalytic reaction.
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高影响因子
APPLIED SURFACE SCIENCE
·
2025
·
IF 6.9
Yaru Xue,Zehui Ma,Nan Yang,Yu Gao,Xiaoxuan Yin,Furang Li,Yifeng Chen,Jiangcheng Li,Yuchao Lyu,Xinmei Liu
The deoxygenation of natural oils is the most mature technology for bio-aviation fuel production. The Ni-ZrO 2 catalyst has been widely researched for the deoxygenation reaction whose catalytic behavior is largely determined by Ni dispersion and oxygen vacancy (Ov) concentration. However, few studies succeed in controlling these two critical factors simultaneously, which hinders further improvement in performance. Herein, an in-situ grinding synthesis method was developed for simultaneous doping of Ni 2+ into ZrO 2 lattice to generate more Ov (O V -Ni-ZrO 2 ) and fabrication of dispersed Ni nanoparticles over the Ni-ZrO 2 catalyst. It involved grinding of nickel source and ZrO 2 precursors followed by crystallization, thus avoiding extra solvents. DFT calculations indicate that doping of Ni 2+ promotes formation of O V -Ni-ZrO 2 which exhibits stronger adsorption capacity toward fatty acid ester and oxygen-containing intermediates than those on pure ZrO 2 (O V -ZrO 2 ). Besides, more Ov-Ni-ZrO 2 interface species and basic (acid) sites are generated over the Ni-ZrO 2 catalyst. The deoxygenation of methyl laurate (ML) proceeds through hydrogenolysis of ML into CH 4 and lauric acid followed by decarbonylation to alkanes. The synergetic effect between dispersed Ni and abundant O V endows the Ni-ZrO 2 catalyst with complete conversion and C 9 -C 12 alkanes yield of 93.2 % in deoxygenation of ML, outperforming the impregnated counterpart significantly.
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